1.广州医科大学附属第二医院口腔科
2.广州医科大学附属第二医院病理科
3.广州医科大学附属第二医院神经科学研究所,广东 广州 510260
许小鸿,硕士,副主任医师,研究方向:抑制舌鳞癌细胞生长的药物筛选及机制研究,E-mail: Mr.xuxiaohong@outlook.com
收稿:2020-11-12,
纸质出版:2021-07-20
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许小鸿,郅程,袁忠民.荜茇酰胺通过诱导口腔鳞癌细胞自噬抑制增殖[J].中山大学学报(医学科学版),2021,42(04):543-549.
XU Xiao-hong,ZHI Cheng,YUAN Zhong-min.Piperlongumine Suppresses Proliferation of Oral Squamous Cell Carcinoma via Promoting Autophagy[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(04):543-549.
许小鸿,郅程,袁忠民.荜茇酰胺通过诱导口腔鳞癌细胞自噬抑制增殖[J].中山大学学报(医学科学版),2021,42(04):543-549. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0409.
XU Xiao-hong,ZHI Cheng,YUAN Zhong-min.Piperlongumine Suppresses Proliferation of Oral Squamous Cell Carcinoma via Promoting Autophagy[J].Journal of Sun Yat-sen University(Medical Sciences),2021,42(04):543-549. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2021.0409.
目的
2
探讨荜茇酰胺(PPLGM)对口腔癌存活的影响及机制。
方法
2
体外培养口腔鳞状细胞癌Cal27及UM1细胞株,经不同浓度的荜茇酰胺处理后,MTT比色法检测荜茇酰胺对增殖的影响,蛋白质印迹法检测胞内微管相关蛋白轻链 3-I、3-Ⅱ (LC3-I、 LC3-Ⅱ)、Beclin1、p62、雷帕霉素靶蛋白(mTOR)及ribosomal S6 (S6) 的表达或活性变化;用自噬抑制剂3-Methyladenine(3-MA)或者Bafilomycin A1(BAFA1)和荜茇酰胺共处理细胞后,检测LC3-Ⅱ、p62表达和细胞活力。
结果
2
与对照组比较,荜茇酰胺显著抑制Cal27及UM1细胞株增殖能力,呈浓度及时间依赖性(
P
<
0.05);Western blot结果显示,不同浓度(1.0、3.0和5.0 μmol/L)荜茇酰胺处理细胞均使LC-I、LC3-Ⅱ表达水平显著高于对照组(
P
<
0.05),而Beclin1和p62表达低于对照组(
P
<
0.05);荜茇酰胺处理组中p-mTOR和p-S6磷酸化水平显著低于对照组(
P
<
0.05);与单独荜茇酰胺处理比较,3-MA和荜茇酰胺共处理使胞内LC3-I和LC3-Ⅱ表达水平明显下降,p62表达升高(
P
<
0.05),但BAFA1和荜茇酰胺共处理使细胞内p62表达升高(
P
<
0.05),LC3-Ⅱ表达水平无明显改变;3-MA和B AFA1处理都能拮抗荜茇酰胺对细胞活力的抑制效应。
结论
2
荜茇酰胺通过抑制mTOR/S6通路活性诱导口腔鳞癌细胞发生自噬,进而抑制增殖。
Objective
2
To explore the effect of piperlongumine (PPLGM) on the proliferation of oral squamous cell carcinoma (OSCC) cells and the potential mechanism involved.
Methods
2
OSCC cell lines Cal-27 and UM1 cultured in vitro were treated with PPLGM at different doses and time courses. Then the viability of Cal-27 and UM1 cells was evaluated by MTT assay and the expression of LC3-I, LC3-Ⅱ, Beclin1, p62 and the phosphorylation of mTOR and S6K were determined by Western blot. Autophagy inhibitors 3-Methyladenine (3-MA) at 100 nmol/L and Bafilomycin A1 (BAFA1) at 400 nmol/L were administrated to observe the rescued effects on the PPLGM-treated cells.
Results
2
PPLGM treatment caused a dose- and time-dependent inhibition on the viability of both Cal-27 and UM1 cells (
P
<
0.05). Western blot results showed the expression levels of LC3-I and LC3-Ⅱ in PPLGM (1.0, 3.0, 5.0 μmol/L) group were significantly higher (
P
<
0.05) and p62 expression levels were lower (
P
<
0.05) compared with the control group. PPLGM treatment at 3.0 or 5.0 μmol/L caused a significant decrease of p-mTOR and p-S6 (
P
<
0.05). Autophagy inhibitors 3-MA significantly rescued PPLGM-induced increase of LC3-I, LC-3Ⅱ and decrease of p62, while BAFA1 just recovered PPLGM-caused decrease of p62. Both 3-MA and BAFA1 could effectively rescue PPLGM-mediated inhibitory effects on the viability of cells.
Conclusion
2
PPLGM suppresses the viability of OSCC cells through promoting mTOR activity loss-dependent autophagy.
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